Final answer:
Nerfing is the opposite of buffing in video games and refers to weakening or reducing the effectiveness of certain aspects. It is used to balance gameplay and ensure fair competition between players.
Step-by-step explanation:
The term that is the opposite of buffing in video games and the name of a popular toy brand is Nerfing. Buffing refers to the act of strengthening or improving certain aspects of a character or item in a game, while nerfing refers to the act of weakening or reducing the effectiveness of those aspects. This term is often used in the context of balancing gameplay and ensuring fair competition between players.